In a survey of 150 people, 90 like tea, 60 like coffee, and 30 like both. How many people like neither tea nor coffee?
Practice Questions
1 question
Q1
In a survey of 150 people, 90 like tea, 60 like coffee, and 30 like both. How many people like neither tea nor coffee?
30
60
90
120
Using inclusion-exclusion, the number of people who like either tea or coffee is 90 + 60 - 30 = 120. Therefore, those who like neither is 150 - 120 = 30.
Questions & Step-by-step Solutions
1 item
Q
Q: In a survey of 150 people, 90 like tea, 60 like coffee, and 30 like both. How many people like neither tea nor coffee?
Solution: Using inclusion-exclusion, the number of people who like either tea or coffee is 90 + 60 - 30 = 120. Therefore, those who like neither is 150 - 120 = 30.
